In the attached photo of the thermostat housing of the Volvo Penta MD7A, the hole at the right receives a 1/2" pipe that runs from the impeller pump housing at the back of the motor. The bushing in the photo goes in the hole. The other photo shows the end of the pipe. There's a bead near the end of the pipe, but nothing at the connection to put a wrench on, so how is this connection made secure and watertight? It wasn't leaking when I (carefully and slowly) worked the housing off the motor, but that joint leaked when I reinstalled the housing. I'm working on getting a new bushing, but that won't be the answer if I can't make the friction-fit connection right. How does a joint of this type work?
Dan
Dan